police officer sean collier and eight-year-old martin richard. at the same time, the medical condition of the surviving suspect-- 19-year-old dzhokhar tsarnaev-- was upgraded to fair from serious. he's now facing federal charges that he and his older brother tamerlan planted pressure cooker bombs near the finish line for the boston marathon. tamerlan later died after a shootout with police. in providence, rhode island, lawyers for tamerlan tsarnaev's wife catherine said she had been unaware of the bombing plot. >> the reports of involvement by her husband and brother-in-law came as an absolute shock to them all. as a mother, a sister, a daughter, a wife, katie deeply mourns the pain and loss to innocent victims, students, law enforcement officers, families and our community. in the aftermath of this tragedy she, her daughter and her family are trying to come to terms with this event. >> woodruff: meanwhile, both the "washington post" and the "new york times" have reported that the younger tsarnaev admitted his role in the attack. the "post" also